Jacketed vessel.



C. RIDDLE.

JAUKETBD VESSEL APPLICATION IKLED use, 191s 1 33,82 1 fateutwl Mm, :30, 1915,

. m Wu 4 6,16% 1/ 7% 62% w. Mp;

CARLTON RIDDLE, 0F AKRON, OHIO.

JAOKETED vnssn'n.

Specification of Letters Patent.

Patented Mar. 30, 1915.

Application filed December 15, 1913. Serial Ho. 806,938.

To all whom it may concern:

Be it known that I, CARLTON ltmnnn, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented a certain new and useful Improvement in J acketed Vessels, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates to the construction of jacketed vessels designed for d gesting, heating, evaporating or impregnating substances.

- One of itsobjects is to provide such a vessel, the inner shell of which is designedto stand both internal and external pressure and will greatly relieve the strain at the joints, due to sudden expansion of either the internal or external shell.

Another object is to elimmate the necessity of stay bolts, commonly used between the two shells of such a vessel.

My invention is hereinafter more fully described in connection with the drawings, and the essential characteristics set forth in the claims.

Figure 1 is a central vertical sect on through a digesting apparatns, illustrating my invention; Fig. 2 is a horizontal section.

The digesting tank comprises a CXllDdFlcal outer shell 5 suitably welded at its upper edge tothe outer periphery of a ring At its lower edge it is suitably welded to the upwardly projecting flange 8, of the convex plate 9, which has a central opening in its bottom portion in which is welded a ring 10. Within this shell 5 is a substantially cylindrical corrugated shell 12, preferably made of suitable boiler plate Welded at its upper edge 14 to the inner periphery of the ring 6. and at its lower edge to the upturned flange 15 of a convex downwardly extending inner bottom 16 having acentral opening, the edge of which is secured to the upper side of the partially convex ring 10. The corrugations of the inner shell are circumferential, and are coarse so that the shell is made longitudinally elastic. The bottom 16 is spaced away from the bottom 10 to pro vide a suitable steam space between them, which communicates with the steam space 17 between the two shells 5 and 12. The outwardly extending portions 18 of the corrugated shell 12 are suitably spaced from the cylindrical shell 5 'to permit free passage of steam. A- steam inlet leading to this steam space is indicated at 20 near the upper part i .Wardly by -means of bolts 27 extending through a clamp 28, having its two arms in engagement with the plate at either side of the-manhole. The removal of this cover allows the admission of the substance to be digested. An inlet for admittin steam for digesting, to the inner shell may fie provided at .29 in the plate 23.

litter. into the inner periphery of the ring l l'is a cylindrical portion 30 of the l 7 having a projecting annular dang-r s.,ted to be removably secured to th ring by snitahie screws. The assage as of this valvebody opens upwardly into the inner shell and provided with a suitable valve seat which engaged by a valve head 35 adapted to close this opening and carried on a valve stem 36, slidable in a guide 38 made rigid with the valve body. At the lower end of the guide 38 is an outwardly projecting flange 89 adapted to be engaged by a ring -10 having an annular groove engaging this flange and a flange 42 of a threaded hub 43 of a hand wheel 45. The wheel is rotatably carried by the flange and is thereby prevented from end move"- ment, providing for raising and lowering the valve stem 36, which is threaded into this hub, when. the hand wheel is rotated. The valve body preferably elbow-shaped and is provided with an annular flange 47 to which may be connected a pipe leading from the valve. This provides a removable connection at this point allowing access to the valve head and valve seat so that they may be cleaned by hand. It also provides for keeping these parts clear of obstructions which might prevent free discharge of the substance within the vessel.

As a means for agitating the contents of the vessel, 1 provide a vertical shaft 50 journaled in a suitable bearing 51 having an outwardly projecting flange 52 secured to th plate 23 and at its lower end, abearingfii ing with a carried on a strip 55 extending across the inner shell and having its ends turned t6 the! side, as at 56, and suitably secure to the lower portion of this shell. The upper bearing is provided with a stufling box of the usual form having packing 58 engaging the shaft 50 and compressed by\the member 59 surrounding the shaft and adapted to be drawn toward the member 51 by screws 60. A pinion 62 carried by a shaft 63 andmeshbeveled gear 64, rigid with the upper end of the shaft 50, provides a suitable means for rotating it; An number of paddles may be secured to this s aft 50. As

shown, I have rovided a rectangular paddle 64 secured to e shaftby means of'a clamp 66 above the bearing 54 and below this hear- .ing is provided a paddle 65 secured to the shaft in the same manner, having a horizontal upper edge. Its lower edge conforms to the shape of the inner bottom 16 and moves in a path adjacent thereto. At its middle portion a largenotch 67 is cut through its lower side to allow the raising movement of the valve head 35. A collar 68 secured to the shaft 50 by means of. a set screw 69 prevents the shaft sliding downwardly\and holds the bevel gears in engagement.

I able manner.

. shells, and during 'lhe vessel may he supported in any suit-* As! shown I have provided four right angled brackets 7 0 secured to the outer shell 5 by means of rivets 71., These may rest upon any suitable support, such as the floor of a room, providing convenient access to the upper part of the casing for filling .the/dig'ester through the manhole 25, and providing convenient access to the valve at the bottom, from the room below.

Now in operation, any desirable material may be dumped into the vessel through the manhole 25, which is then closed. The space between the jackets is supplied with steam through the port 20 and steam for digesting may be supplied to the interior of the vesse by the port 29. At the beginning of the operation, the pressure on the outside of the inner shell is very apt to be greater than the pressure within said shell, and later in the operation the steam pressure used for d1- gesting is apt to be superior to the pressure, between the shells, also the steam pressure between the shells remains constant during the discharging and filling operations, at which time there isno pressure within the inner shell. The circumferential corrugations of the'inner shell greatly strengthen it to resist this wide variation in pressure. These conditions also cause at times, great differences in the temperature of the two the filling operation the cold material coming in contact with the inner shell constantly cools it while the outer shell remains hot. The differences in temperature of the two shells, causes one to expand. or contract much-more than the other, which would ordinarily be very in- .them due tosudden contraction or expansion of their shells. It will befurther seen that the device is conveniently arranged and easy to operate. It provides for rapidly discharging matter therein and is easily accessible for cleaning.

Having thus described my invention, what I claim is:

1. The combination of an outer shell, a corrugated inner shell spaced from the outer shell and connected therewith at the upper end, end members for the inner and outer shells spaced apart and each having a central opening, a ring secured in said opemng and a valve mounted in said ring, a closure for the other end of the inner shell, a beering centrally mounted thereon, a transverse member carried by the inner shell and havng a hearing, a shaft mounted in said bearmg, an. agitator on saidshaft, there being an opening through the upper end member of the inner shell, and a closure for said opening. V

2. The combination of anouter shell, an end member closing one end'of said shell, a corrugated inner shell secured In the outer shell at its upper end and spaced from the outer shell, an end member parallel with the end member of the outer shell and adjacent thereto, central openings through the adjacent end members of the inner and outer shells, a ring mounted between the end members at the opening, said end members overlapping the same, a valve carried by said ring and adapted to open inwardly into the inner shell, a closure for the upper end of the inner shell having a downwardly turned flange fitting inside said shell, an opening in said closure surrounded by an inwardly turned flange, a closure for said opening adapted to be drawn upwardly againstsaid flange,..and means for securing the same in 10 ner shell, means for supplying steam ressure to the space between said shells, an means for agitating matter in the interior of the inner shell.

- 4. The combination of an outer shell, a corrugated inner shell spaced from the outer shell and connected therewith at the upper end, end membersfor the inner and outer shells spaced apart, a closure for the other end of the inner shell, a bearing centrally mounted thereon and provided with a stuffing box, a shaft extending through said stufiing box, an agitator carried on said shaft, means for rotating the shaft, and independent means for admitting pressure to the interior of the inner shell and to the space between the shells.

In testimon whereof, I hereunto aflix my Signature in t 1e presence of two witnesses.

CARLTON RIDDLE. Witnesses ALBERT H. Barns,

BRENNAN B. \VEs'r. 

